Mattress



FIG. 1 is a top perspective view of a mattress of the present invention.

FIG. 2 is a top view of the mattress of FIG. 1.

FIG. 3 is a right side view of the mattress of FIG. 1.

FIG. 4 is a left side view of the mattress of FIG. 1

FIG. 5 is a right end view of the mattress of FIG. 1 with the left end being a mirror image thereof; and,

FIG. 6 is a bottom view of the mattress of FIG. 1.

The portions of the mattress shown in broken lines are included for the purpose of illustrating environment and form no part of the claimed design. 

CLAIM I claim the ornamental design for a mattress, as shown and described. 